Análise temporal da vegetação de caatinga utilizando NDVI.

Abstract

In semiarid northeast growing environmental degradation has caused increasingly signiicant desertiication processes, bringing as immediate loss of soil fertility and biodiversity consequences. This study aimed to use the NDVI to study the environmental deterioration in the municipality of Sumé - PB by temporal analysis of satellite images of medium spatial resolution using geotechnology. We used Google Earth to select representative ground targets of different vegetation types and conducted ield visits to georeference and describe the vegetation. Images of LANDSAT 5 of 09/05/1987 and 28/10/2009 were used, and using ERDAS 8.5, the radiometric corrections were performed and obtained images of radiance and relectance, and NDVI images generated. Using the SPRING 5.2 were classiied using the LEGAL in 6 classes of vegetation. From the results obtained it was observed that there was a recovery of vegetation, the increase in class Arboreal sub arboreal dense area of 10.96 % in class Sub arboreal dense 24.52%, and class Shrub sub arboreal dense 13.7%.